Calculate the area of a triangle between three points
Rounding off numbers to n decimals
Sum two matrices
Generate n equally spaced "intervals" between -x and x (★)
Factorize uniquely! (★★)
Sum of terms in a series 1 (★★★)
Function 1 (★)
Get the elements of diagonal and antidiagonal for any m-by-n matrix (★★★★)
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